Used this setup on our ACE.
6" PVC pipe, 22.5deg angle joint, and end cap/locking drop down cap.
Be sure to adjust the generator exhaust off the pipe. 2 dump hoses fit with no issue. I think you could go with 4 inch pipe/hardware but then hose end fittings may be tight.
$30 for the 6" x 10' PVC Pipe
$30 for the 22.5 elbows
$70 for end caps and mounting hardware
(
https://www.finditparts.com/products...products-cc600 )
It worked great for us for a 2 yr full time adventure.
As with all the longer overhang vehicles you must be aware of your ground clearance.
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